If you are looking at a reflector you could also consider the meade schmidt-newtonian. The 8" F/4 will have a focal length of 810mm.
Here is a gallery of someone who uses that OTA with film, and your 350D will have a smaller image plane than the 35mm film.
If it was me I'd go an ultrafast apo refractor, theres so many on the market now at decent prices. The WO-66 with a 0.8 focal reducer/flattener has a focal length of just 12 inches! You could probaby fit it in your finderscope bracket!
